<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>HelloWorld</title>
</head>
<body >
  <form name="loginForm" method="POST" action="servlet/HelloServlet">
    <table>
      <tr>
        <td><div align="right">User Name:</div></td>
        <td><input type="text" name="username"></td>
      </tr>
      <tr>
        <td><div align="right">Password:</div></td>
        <td><input type="password" name="password"></td>
      </tr>
      <tr>
        <td><input type="submit" name="submit" value="submit"></td>
        <td><input type="reset" name="reset" value="reset"></td>
      </tr>
    </table>
  </form>
</body>
</html>

<!--POST /servlet/HelloServlet HTTP/1.1
Host: localhost:8080
Connection: keep-alive
Content-Length: 41
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://localhost:8080
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-Fetch-Site: same-origin
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Referer: http://localhost:8080/hello5.htm
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9,ja;q=0.8
Cookie: Idea-c0be65fd=5a963f88-c89b-4ce1-b06d-5a8844c05471; Pycharm-51a911b7=67aa6666-2184-46d6-9a2a-795e96aca515; 3AB9D23F7A4B3C9B=7GMBOUPILX7KNADZZXRFNPI7ZXSLWBORK5TM4K6UWK4RJXBGPCBUBOPI4FXUJ3WS4CHVKT6QR7UCGFKLZ6MDW663SY; Hm_lvt_877617efccb857b835eeeba62fdfd8c1=1586682932; _bl_uid=FLktO8C0wyFumn17UuemeL2gRwgb; UM_distinctid=1716dac2e3b171-0aa3cc34a66584-153f6555-fa000-1716dac2e3d5f6; CNZZDATA1000386340=935934295-1586682932-%7C1586682932

username=liyang&password=ly&submit=submit-->